Picking motion for looms



Aug. 7, 1928. c. L. MAY

rxckme MOTION FOR Locus Filed Oct. #2, 1927 hVf/ifU/ 6/0 2008 L. [Key M Patented Aug. 7, 1928.

* UNITED STATES PATENT oF'F'Ic' E.

CLARENCE MAY, or WoRcEsTER, MASSACHUSETTS, AssronoRTo, cRouPToiw a; KNOWLES LOOM WoRKS, E WORCESTER, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS.

PICKING MOTION FOR LOOMS.

Application filed October 12; 1927. Serial No. 225,795.

This invention relates to improvements in pickin' motions for looms, and it is the general 0 ject of the invention to provide a readily adjustable picking shoe which shall be held rigidly to its supporting shaft.

One form of picking motion employs a rectangularrocker shaft known as the picking shaft which runs from the front to the back of the loom and is supported in bear- 1'() ings carried by the front and rear cross girts. A pickershoe is secured to this shaft 1n proper position to have the cam face thereof cooperate with an actuating picker arm v keyed or otherwise secured to the bottom shaft of the loom. The bottom shaft runs lengthwise of the loom so that the picking arm revolves in a lane parallel to the picker shaft. As hereto ore constructed the picker shoe has usually been cast as one piece, but when the bearings for the picker shaft are not properly located 1 with respect to the bottom shaft considerable fitting and adjusting is necessary to have the cam of the picker shoe properly placed relatively to the picking arm on the bottom shaft. It 1s an important object of my present invention to provide a two-part picker shoe, the body of which is secured to'the picker shaft and the cam portion of which'is adjusted with respect to the body portion by being pivoted thereto so as to move vertically in a plane perpendicular to the icker shaft and parallel to the bottom sha t.

It is a more particular object ofmy" invention to provide holding screws on OPPO', site sides of the picker shaft so that the cam portion may be held in adjustable position, relatively to the picker shaft.

With these and other advantages which will appear as thedescription proceeds, my inventlon' resides in the combination and arrangement of the parts hereinafter set forth'a-nd described.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a vertical transverse section across the bottom shaft of the loom, showing the picking arm, picker shaft and my '50 improved shoe in the position these parts assume at the beginning ofa pick,

Fig. 2is a top plan View of my improved picker shoe on an enlarged scale, and,

Figs. 3 and 4 are enlarged vertical sections,

on lines 3-3 and Fig. 1.

4+4, respectively,- of Referring to the' drawings the bottonfglmfi 10 has keyed thereto a picking arm 11 which,"

as shown herein, supports a pair of pickingv balls 12- which rotate on studs 13 adjush ably mounted in slots 14. A picker shaft 15 of rectangular cross section, as indicatedin' Figs. 3 and 4 has the ends thereof niounb ed for oscillation in bearings, not shown, to propelthe shuttle. The parts thus far described are common construction and form no part of my present invention. 1

My invention relates to the picker shoe which is the means oftr'ansferring power from the pickerballs12 to the picking shaft.

15, and incarryingmy invention into effect I form the picker shoe' of twoparts, body B securedin adjustable position on the shaft 15 by said screws 16' and havin a bore 17 in which the picker shaft fits. T body has an extension 18 in which is disposed vertically a relativelylarge screw 19 having a square head 20 and held imposition By a lock nut 21'. 7 On the oppositeside of picker shaft 15 I provide a second extension 22 in which is vertically disposed a somewhat lighter screw 23 having a head 24 and a lock nut 25. The parts associated with the ofthe shoe are rigid with respect to the picker shaft and move with the latter..

The cam part C of the picker shoe which engages the balls is formed with symmetrically disposed cam faces 26' which are formed The as indicated more clearly in" Fig. 1.- cam portion G has that portion" thereof 1 ing under the cam faces 26 formed as aflat inverted V, asindicated at 27 to receive the upper end of the screw 19. On the other side of the cam portion therev is a lug 28 which is in contactwith the upper end of the lighter screw 23;

The two parts of the cam are secured to gether by means of a pin 29 which is mounted in a pair of extending cars 30 formed on the body B of the picking'shoe: The pin 29' passes through a bearing 31 on the cam por- 1 loom, in which case one of the picking balls would be omitted. Should either cain face 26 become worn so that picker shaft 15 is not rocked quite as far as it should be to give the proper pick to the shuttle, the lighter screw 23 can be moved downwardly and the relatively heavier screw 19 can be moved up wardly s as. to rock the cam portion C in a right hand direction, as viewed in Fig. 4, around the pin 29 defining the pivotal connection between the two parts of the shoe. When the proper position for the cam faces is determined, the lighter screws 23 can be tightened so that the parts B andC of the shoe will be rigid with respect to each other. Such a construction affords a convenient way to adjust the picking of the loom without requiring such accurate setting of the bearings for the picker shaft.

I rom the foregoing-it will be seen that I have provided a very simple picking shoe formed of two parts pivoted to each other and, so related that the cam faces which c0- operate with the picking ball may be raised as a Whole relatively to the picker shaft so as to vary the extent of oscillation of the latter. It will further be seen that this adjustment is in a plane perpendicular to the picker shaft so that the maximum effect of the adjustment may be obtained, the cam portion moving as a whole in a vertical direction. Furthermore, the screws 19 and 23 afford means not only for adjusting the two parts of the shoe but also for holding the same rigidly with respect to each other so as to prevent any lost motion which may result from the necessary clearance between the pin 29 and the parts through which it extends. It. will also be seen that the cars limit longitudinal movement of the cam motion C longitudinally of the shaft 15 and that the large screw 19, as clearly shown in Fig. 1, is located directly under the cam faces 26 so that the force of the picking ball is efficiently transn'iitted from the cam portion C to the body B without subjecting either of the parts of the shoe to internal strain.

Having thus described my invention it will be apparent that changes and modification may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the herein disclosed but what Iclaim is:

'1. In a picking motion for a loom having a bottom shaft with a picking arm and a picker shaft, a picker shoe including a body portion secured to the picker shaft, said picker shoe having a cam portion pivotally mounted on the body portion to move in'a vertical plane to raise the cam portion as a whole with respect to the picker shaft.

In a picking motion for a loom having a bottom shaft with a picking arm and ball and a picker shaft, a picker shoe body portion secured to the picker shaft, a cam portion having surfaces to engage the picker ball, means defining a pivotal connection beween the body and cam portions of the shoe, said pivotal connection extending substantially parallel to the picker shaft, and means to hold the two parts of the shoe inadjustable position, the cam portion moving as a whole in a plane perpendicular to the picking shaft relatively to the body portion to raiseand lower the picking surface as a whole relatively to the picker shaft.

3. In a picking motion for a loomhaving a bottom shaft with a picking arm and a picker shaft, a picker shoe body portion secured to the picking shaft, upwardly extending ears formed on the body portion, a cam portion part of which extends between and substantially fills the space-between said ears, means defining a pivotal connection between the ears and the cam portion, said pivotal connection being substantially parallelto the picker shaft, and means to hold the body and cam portions of the shoe in adjusted position.

4. In a picking motion for a loom having a bottom shaft with a picking arm and a picker shaft, a picker shoe body portion secured to the picker shaft, spaced ears in horizontal alignment extending from the body ortion a cam ortion havin a art thereof located between the ears, a pin extending through the ears and that part of the cam portion located between the ears to define a substantially horizontal pivotal connection between the body and cam portions of the shoe, and means to cause relative angular movement of the body and cam parts of the shoe in a vertical direction about the horizontal pin as a pivot to raise and lower the cam portion as a whole in a vertical direction relatively to the picker shaft.

5. In a picking motion for a loom having a bottom shaft with a picking arm and ball and a picker shaft, a picker shoe body portion secured to the picker shaft, a" cam portion for the shoe, means defining the horizontal pivotal connection between the body and cam portions, said cam portion having a face to cooperate with the picking ball, and an adjusting screw mounted in the body por tion and located under the surface ofthe can-1 portion as a whole in a vertical direction and 6. In a picking motion for a loom having a bottom shaft with a picking arm and ball and a picker shaft, a body portion for thev shoe secured to the picker shaft and having extensions on opposite sides of the shafts, a cam portion for the picker shoe also having extensions on opposite sides of the shafts, a horizontal pin defining a pivotal connection between the body and cam portions of the shoe, a screw located in one extension on one side of the picker shaft to engage the other extension on the same side of the picker shaft to transmit the pressure of-the picking ball of the cam and cam portion to the body portion, and a holding screw to establish operative connection between the extensions on the opposite side of the picking shaft, said screws cooperating to hold the cam and body portions rigidly with respect to each other.

In testimony whereof I have hereunto affixed my signature.

CLARENCE L. MAY. 

